Tool for assembling open spring retainer ring

Abstract

A tool for assembling an opening spring retainer ring is used for assembling the opening spring retainer ring into a limiting groove of a valve block and fixing an end cover and the valve block into a whole and comprises a pressing head, a pressing sleeve and a retainer ring positioning sleeve, and the pressing head comprises a flange part and a cylinder part used for abutting against the end cover; the pressing sleeve comprises a cylinder bottom and a cylinder wall, the cylinder bottom is provided with a through hole allowing the cylinder part to penetrate through, the cylinder wall is used for abutting against the opening spring clamping ring on the port side, the outer diameter of the cylinder wall is consistent with the inner diameter of the clamping ring positioning sleeve, and the wall thickness of the cylinder wall is smaller than or equal to the difference between the inner diameter of the port, used for installing the end cover, of the valve block and the corresponding outer diameter of the end cover; a clamping ring groove used for temporarily fixing an opening spring clamping ring is formed in the lower end side of a cylinder body of the clamping ring positioning sleeve, and the inner diameter of the clamping ring groove is set to be smaller than or equal to the inner diameter of a port, used for installing an end cover, of the valve block. The tool is simple in structure and can be operated in a small space, so that a stable and reliable integral structure is obtained.

Description

Technical Field

[0001] This utility model relates to the field of motor assembly technology, and more specifically to a tooling for assembling open spring retainers. Background Technology

[0002] In the context of intelligent and electric vehicles, traditional internal combustion engines are being replaced by electric motors and batteries. This results in a lack of a vacuum source in the vehicle, making it impossible to build up pressure in the hydraulic lines using a vacuum booster. Vacuum booster pumps, due to their high noise levels and short lifespan, have not been widely adopted. Braking by wire effectively solves this problem by using an electric motor instead of a vacuum booster to build up pressure in the brake hydraulic lines. Depending on the implementation of the braking by wire system in passenger vehicles, current systems can be divided into two categories: EHB (Electro-hydraulic Braking System) and EMB (Electro-mechanical Braking System). EHB is based on the traditional hydraulic braking system, replacing some mechanical components with electronic devices and using brake fluid as the power transmission medium. It also features a hydraulic backup braking system and is currently the mainstream technology. Based on the level of integration, EHB is further divided into two types: separate and integrated. The integrated type uses an electric motor to provide torque and a ball screw to convert rotational motion into linear motion, which in turn drives a piston, compressing the brake fluid in the cylinder to generate hydraulic pressure.

[0003] In existing integral structures, multiple end cap structures need to be connected to the valve block structure, and the connection methods are not limited to threaded, riveted, or retaining ring fixing. Figure 1 , 2 In the connection method shown, the open spring retainer 9 is assembled into the limiting groove of the valve block 8 to fix the end cover 6 and the valve block 8 into a whole, preventing the end cover 6 from falling off, and is sealed with a sealing ring 7.

[0004] However, the disadvantages of this existing technical solution are as follows: when assembling the open spring retainer 9, there are several methods, namely ① manual assembly, ② production line assembly, and ③ manual tooling assembly. Among them, manual assembly requires a large operating space for the hands, and long-term assembly will cause injury to the hands; production line assembly can only be carried out on the production line and cannot be done offline; some existing manual tooling assemblies use structures similar to production line assembly, and the tooling structure is large, which cannot meet the needs of operation in small spaces, such as the need to change operations on the whole vehicle. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a tooling for assembling open spring retainers, which can improve assembly efficiency.

[0006] According to this utility model, a tooling for assembling open-end spring retainers is provided, which is used to assemble open-end spring retainers into the limiting groove of a valve block, fixing the end cap and the valve block into a whole. The tooling includes: a pressure head, a pressure sleeve, and a retainer positioning sleeve. The pressure head includes a flange portion and a cylindrical portion for abutting against the end cap. The pressure sleeve includes a cylindrical bottom with a through hole for the cylindrical portion to pass through and a cylindrical wall for abutting the open-end spring retainer at the port side. The outer diameter of the cylindrical wall is the same as the inner diameter of the retainer positioning sleeve, and the wall thickness of the cylindrical wall is less than or equal to the difference between the inner diameter of the valve block's port for inserting the end cap and the corresponding outer diameter of the end cap. A retainer groove for temporarily fixing the open-end spring retainer is provided on the lower end side of the retainer positioning sleeve's cylindrical body. The inner diameter of the retainer groove is set to be less than or equal to the inner diameter of the valve block's port for inserting the end cap.

[0007] Preferably, the pressure head is configured with a T-shaped or cross-shaped cross-section structure.

[0008] Preferably, the pressure sleeve is configured as a bottomed cylindrical structure, and a groove is provided at the bottom of the pressure sleeve to accommodate the flange portion of the pressure head.

[0009] Preferably, the recess depth of the retaining ring groove relative to the inner wall of the cylindrical part of the retaining ring positioning sleeve is less than or equal to the cross-sectional radius of the open spring retaining ring.

[0010] Preferably, the tooling for assembling open spring retainers further includes a gasket for attachment between the pressure head and the pressure sleeve or between the pressure head and the end cap.

[0011] The tooling for assembling open spring retainers proposed in this utility model has a simple structure and can be operated in a small space, thereby obtaining a stable and reliable integral structure. Attached Figure Description

[0012] Figure 1 A schematic diagram of the assembly structure of the end cap and valve block is shown.

[0013] Figure 2 A schematic diagram of an open spring retainer is shown.

[0014] Figure 3 This is a cross-sectional view of a tooling for assembling an open spring retainer according to an embodiment of the present invention.

[0015] Figure 4 A perspective view of the retaining ring positioning sleeve of the tooling is shown schematically.

[0016] Figure 5 A schematic cross-sectional view of the retaining ring of the tooling is shown.

[0017] Figure 6 A perspective view schematically shows a retaining ring positioning sleeve with an open spring retaining ring installed.

[0018] Figure 7A cross-sectional view of a retainer locating sleeve with an open spring retainer ring is schematically shown.

[0019] Figure 8 The diagram illustrates the operating conditions of the tooling.

[0020] Figure 9 A schematic cross-sectional view of a modified tooling for assembling an open spring retainer is shown. Detailed Implementation

[0021] The exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the present invention, enabling those skilled in the art to implement and use the present invention in various environments and for various applications. Therefore, the scope of protection of the present invention is defined by the appended claims, and the exemplary embodiments are not intended, and should not be considered, a limiting description of the scope of protection of the present invention. Furthermore, for ease of description, the dimensions of the various parts shown in the drawings are not necessarily drawn to actual scale. Orientation descriptions, such as circumferential, up, down, left, right, top, bottom, etc., relative to an axis, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or partial constructions will be omitted where they may cause confusion or make the understanding of the present disclosure difficult to observe. Unless otherwise specifically stated, the order and numerical values ​​of the components and assembly steps described in the embodiments do not limit the scope of this invention.

[0022] like Figures 3 to 8 As shown, according to an exemplary embodiment of the present invention, a tooling for assembling open spring retainers is proposed, comprising: a pressure head 1, a pressure sleeve 2, and a retainer positioning sleeve 3.

[0023] The pressure head 1 is configured as a T-shaped structure, including a large-diameter flange portion 21 and a small-diameter cylindrical portion 22. The top surface of the flange portion 21 is used to apply external force, while the bottom surface of the cylindrical portion 22 is used to abut against the end cover 6, thereby transmitting pushing force to the end cover 6 and driving the end cover 6 to penetrate deeper into the valve block 8.

[0024] The pressure sleeve 2 is configured as a bottomed cylindrical structure, including a cylindrical bottom 23 with a through hole through which the cylindrical portion 22 of the pressure head 1 passes, and a cylindrical wall 24 for abutting the open spring retainer 9 at the port side. The outer diameter of the cylindrical wall 24 is the same as the inner diameter of the retainer positioning sleeve 3, so that it can enter from the upper end side along the inner wall of the retainer positioning sleeve 3 until the port side of the cylindrical wall 24 pushes the open spring retainer 9 away from the lower end side of the retainer positioning sleeve 3. The wall thickness (radial thickness) of the cylindrical wall 24 is preferably less than or equal to the corresponding gap between the inner wall of the valve block 8 and the outer peripheral surface of the end cap 6 into which the valve block 8 is installed, that is, less than or equal to the difference between the inner diameter (radius) of the port of the valve block 8 into which the end cap 6 is installed and the corresponding outer diameter of the end cap 6.

[0025] The retaining ring positioning sleeve 3 is integrally formed as a cylindrical body. On the lower end side of the cylindrical body, a retaining ring groove 10 is preferably provided, with a depth of indentation relative to the inner wall of the cylindrical body that is less than or equal to the cross-sectional radius of the open spring retaining ring 9, for temporarily fixing the open spring retaining ring 9. The inner diameter of the retaining ring groove 10 is set to be less than or equal to the inner diameter of the port of the valve block 8 for inserting the end cap 6, so that when the lower end side of the retaining ring positioning sleeve 3, on which the open spring retaining ring 9 is placed, is aligned with the port of the valve block 8 for inserting the end cap 6, the open spring retaining ring 9 can smoothly disengage from the retaining ring groove 10 and enter the valve block 8 when pushed by the upper cylindrical wall 24.

[0026] Therefore, the positioning groove 10 in the retaining ring positioning sleeve 3 is configured to precisely accommodate the open spring retaining ring 9, for example, allowing the open spring retaining ring 9 to be temporarily assembled into the positioning groove 10 under a predetermined tension state. Under this predetermined tension state, the inner diameter of the open spring retaining ring 9 is larger than or substantially the same as the outer diameter of the end cover 6, thereby allowing the open spring retaining ring 9 to slide further into the valve block 8 along the outer wall of the end cover 6.

[0027] like Figure 8 As shown, during assembly, the open spring retainer 9 is first assembled into the retainer groove 10 of the retainer positioning sleeve 3 with a predetermined tension. The end cap 6 is then placed into the positioning hole 11 on the port side of the valve block 8. The retainer positioning sleeve 3 with the open spring retainer 9 is then placed on the port wall of the valve block 8. Subsequently, the pressure head 1 and the pressure sleeve 2 are installed into the retainer positioning sleeve 3. The pressure head 1 is pressed, causing it to push the pressure sleeve 2 and the end cap 6 to move simultaneously, pressing the end cap 6 into the positioning hole 11 of the valve block 8. Because there is an axial gap h between the snap-fit ​​surface of the end cap 6 and the snap-stop surface of the valve block 8, when the end cap 6 is pressed into contact with the valve block 8 by gradually reducing the axial gap h, the open spring retainer 9 just enters the retainer groove 10 in the valve block 8. The tooling is then removed, and the assembly is complete.

[0028] Preferably, the pressure head 1 first presses the end cover 6 downwards a certain distance, and then the pressure head 1 contacts the pressure sleeve 2, pressing the spring retainer 9 and the end cover 6 into the valve block 8 along with the pressure sleeve 2, until the spring retainer 9 enters the valve block retainer groove 10. At this time, the operator will hear the corresponding sound.

[0029] The beneficial effects of this utility model's technical solution are as follows: the tooling structure is simple and easy to manufacture; the assembly process is simple and easy to learn; the tooling structure is small, making it easy to assemble in confined spaces; the pressure head 1 structure can be adjusted according to the length of the end cover 6, for example, the length of the pressure head 1 can be adjusted accordingly to meet the assembly requirements of different end covers 6, resulting in high adaptability. When assembling the end cover 6 and the open spring retainer 9, especially when HDBS products are on a vehicle, manual assembly is not suitable due to the limited operating space. Using this tooling can greatly improve assembly efficiency.

[0030] Therefore, the corresponding dimensions of each component of the tooling can be designed based on the dimensions of the axial clearance h, end cap 6, and valve block 8. For example, adjustments can be made according to the structure of different spring retainers 9 and end caps 6 to meet the assembly requirements of products of different specifications; optionally, shims of different specifications can be added between the pressure head 1 and the pressure sleeve 2 or end cap 6 to adjust and adapt to different pressing strokes. Alternatively, it is also possible to... Figure 9 As shown, a recess 25 for accommodating the flange 21 of the pressure head 1 is provided at the bottom 23 of the sleeve 2, which allows for more flexible adaptation to different specifications. Even after the flange 21 of the pressure head 1 falls into the recess 25, additional pushing force can still be applied to the sleeve 2 from the bottom 23 around the recess 25, thus more reliably achieving the pushing of the sleeve wall 24 onto the open spring retainer 9. Correspondingly, the sleeve 2 can also be made into an H-shaped cross-section, and the pressure head 1 is not limited to a T-shaped structure, but can also be made into a cross-shaped cross-section.

[0031] In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified. Unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Although the present invention has been described with reference to various specific embodiments, it should be understood that modifications can be made within the spirit and scope of the described inventive concept. Therefore, it is intended that the present invention be limited to the described embodiments but will have the full scope defined by the language of the appended claims.

Claims

1. A tooling for assembling an open spring retainer (9), used to assemble the open spring retainer (9) into the limiting groove of a valve block (8), fixing the end cap (6) and the valve block (8) into a whole, characterized in that, include: The compression head (1), compression sleeve (2), and retaining ring positioning sleeve (3) are provided. The compression head (1) includes a flange (21) and a cylindrical part (22) for abutting the end cap (6). The compression sleeve (2) includes a cylindrical bottom (23) with a through hole for the cylindrical part (22) to pass through and a cylindrical wall (24) for abutting the open spring retaining ring (9) at the port side. The outer diameter of the cylindrical wall (24) is consistent with the inner diameter of the retaining ring positioning sleeve (3). The wall thickness of the cylindrical wall (24) is less than or equal to the difference between the inner diameter of the port of the valve block (8) for inserting the end cap (6) and the corresponding outer diameter of the end cap (6). The lower end of the cylindrical body of the retaining ring positioning sleeve (3) is provided with a retaining ring groove (10) for temporarily fixing the open spring retaining ring (9). The inner diameter of the retaining ring groove (10) is set to be less than or equal to the inner diameter of the port of the valve block (8) for inserting the end cap (6).

2. The tooling for assembling open spring retainers according to claim 1, characterized in that, The pressure head (1) is configured as a T-shaped or cross-shaped cross-section structure.

3. The tooling for assembling open spring retainers according to claim 1, characterized in that, The pressure sleeve (2) is configured as a bottomed cylindrical structure, and a groove (25) for accommodating the flange (21) of the pressure head (1) is provided at the bottom (23) of the pressure sleeve (2).

4. The tooling for assembling open spring retainers according to claim 1, characterized in that, The groove (10) of the retaining ring is recessed to a depth less than or equal to the cross-sectional radius of the open spring retaining ring (9) relative to the inner wall of the cylindrical part of the retaining ring positioning sleeve (3).

5. The tooling for assembling open spring retainers according to claim 1, characterized in that, It also includes a gasket for attachment between the pressure head (1) and the pressure sleeve (2) or between the pressure head (1) and the end cap (6).

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